--- a/hotspot/src/share/vm/runtime/mutexLocker.cpp	Thu Jun 25 13:23:36 2015 +0000
+++ b/hotspot/src/share/vm/runtime/mutexLocker.cpp	Thu Jun 25 18:25:19 2015 +0200
@@ -100,6 +100,8 @@
 Mutex*   ExceptionCache_lock          = NULL;
 Monitor* ObjAllocPost_lock            = NULL;
 Mutex*   OsrList_lock                 = NULL;
+Mutex*   ImageFileReaderTable_lock    = NULL;
+
 #ifndef PRODUCT
 Mutex*   FullGCALot_lock              = NULL;
 #endif
@@ -227,6 +229,7 @@
   def(ProfilePrint_lock            , Mutex  , leaf,        false, Monitor::_safepoint_check_always);     // serial profile printing
   def(ExceptionCache_lock          , Mutex  , leaf,        false, Monitor::_safepoint_check_always);     // serial profile printing
   def(OsrList_lock                 , Mutex  , leaf,        true,  Monitor::_safepoint_check_never);
+  def(ImageFileReaderTable_lock    , Mutex  , nonleaf,     false, Monitor::_safepoint_check_always);     // synchronize image readers open/close
   def(Debug1_lock                  , Mutex  , leaf,        true,  Monitor::_safepoint_check_never);
 #ifndef PRODUCT
   def(FullGCALot_lock              , Mutex  , leaf,        false, Monitor::_safepoint_check_always);     // a lock to make FullGCALot MT safe